pure-GPU nommap small     |  62.29 | GPU | VRAM:22975 | ub=128 b=512 t=4
pure-GPU ts=0.5,0.5       |  63.89 | GPU | VRAM:23002 | ub=128 b=512 t=4
tune t=2                  |   64.1 | GPU | VRAM:22980 | ub=128 b=512 t=2
tune t=6                  |  64.18 | GPU | VRAM:22982 | ub=128 b=512 t=6
tune t=8                  |  63.11 | GPU | VRAM:22980 | ub=128 b=512 t=8